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STB_Servo_whand.py
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from __future__ import division
#!/usr/bin/env python
## BEFORE RUNNING ON NEW COMPUTER
# Install Phidget Libraries: http://www.phidgets.com/docs/OS_-_Linux#Getting_Started_with_Linux
# Install Phidget Python libraries: http://www.phidgets.com/docs/Language_-_Python#Linux
# Test Phidget with demo code: http://www.phidgets.com/downloads/examples/Python.zip
# Make sure it works with demo code, this code is pretty basic
# Phidget Python API reference: http://www.phidgets.com/documentation/web/PythonDoc/Phidgets.html
import csv
import time
import os
import datetime
import time
import numpy as np
import hapticsstb
import math
from Phidgets.PhidgetException import PhidgetErrorCodes, PhidgetException
from Phidgets.Devices.AdvancedServo import AdvancedServo
FORCE_SCALE = 4
def Error(e):
try:
source = e.device
print("Phidget Error %i: %s" % (source.getSerialNum(), e.eCode, e.description))
except PhidgetException as e:
print("Phidget Exception %i: %s" % (e.code, e.details))
# Setup Phidget
servo = AdvancedServo()
servo.setOnErrorhandler(Error)
# Open Phidget
servo.openPhidget()
servo.waitForAttach(500)
# Set Phidget servo parameters
try:
motor = 0
servo.setEngaged(0, True)
servo.setEngaged(1, True)
servo_min = servo.getPositionMin(motor) + 100
servo_max = servo.getPositionMin(motor) + 150
servo_mid = (servo_max - servo_min)/2
servo.setAcceleration(1, 500)
servo.setAcceleration(motor, 500) # I just picked these to be smooth, feel free to change
servo.setVelocityLimit(1, 2000)
servo.setVelocityLimit(motor, 2000)
except PhidgetException as e:
print("Phidget Exception %i: %s" % (e.code, e.details))
print("Exiting....")
exit(1)
# Set up STB
sample_rate = 50 # This works best with low sampling rates
# Call STB's constructer (init)
sensor = hapticsstb.STB(sample_rate)
sensor.bias() # Tares the sensor, make sure that nothing's touching the bordcr
print sensor.bias_vector
run_time = 600
volt = 3.3
start_time = time.time()
sensor.start_sampling() # Starts the STB hardware sampling loop
try:
fname = time.strftime("%H_%M_%S_%m_%d_%Y")
newdir = "/home/haptics/joshdata/"
os.chdir(newdir)
while time.time() - start_time <= run_time:
# read_M40 returns [Fx, Fy, Fz, Tx, Ty, Tz]
sensor_data = sensor.read_m40()
handedness = sensor.read_acc()
#print("left hand" + str((handedness[0])))
#print("right hand" + str((handedness[1])))
#print sensor_data[0]
#print sensor_data[1]
#print sensor_data[2]
mag = (sensor_data[0]**2 + sensor_data[1]**2 + sensor_data[2]**2) ** (1/2)
conv = (5/7)
pos = servo_min + (mag * ((servo_max - servo_min)*conv) / FORCE_SCALE)
#eric = (pos, "left")
#josh = (pos, "right")
#hand one
if handedness[0] < volt:
# Scale force to +- 30N for whole range of servo
if pos <= servo_max and pos >= servo_min:
servo.setPosition(0, pos)
elif pos > servo_max:
servo.setPosition(0, servo_max)
elif pos < servo_min:
servo.setPosition(0, servo_min)
else:
servo.setPosition(0, servo_min)
#hand two
if handedness[1] < volt:
if pos <= servo_max and pos >= servo_min:
servo.setPosition(1, pos)
elif pos > servo_max:
servo.setPosition(1, servo_max)
elif pos < servo_min:
servo.setPosition(1, servo_min)
else:
servo.setPosition(1, servo_min)
cat = (pos, time.time()-start_time, sensor_data[0], sensor_data[1], sensor_data[2])
with open(fname + ".csv", "a") as csvfile:
spamwriter = csv.writer(csvfile, delimiter = ',')
spamwriter.writerow(cat)
# Scale force to +- 30N for whole range of servo
#pos = servo_mid + (sensor_data[2])*(servo_max - servo_mid)/FORCE_SCALE
#if pos <= servo_max and pos >= servo_min:
# servo.setPosition(motor, pos)
# servo.setPosition(1, pos)
#elif pos > servo_max:
# servo.setPosition(motor, servo_max)
# servo.setPosition(1, servo_max)
#
#elif pos < servo_min:
# servo.setPosition(motor, servo_min)
# servo.setPosition(1, servo_min)
# print( "Sensor data: " + str(sensor_data) );
except KeyboardInterrupt:
pass
except PhidgetException as e:
print("Phidget Exception %i: %s" % (e.code, e.details))
print("Exiting....")
exit(1)
except:
sensor.close() # Need to run this when you're done, stops STB and closes serial port
servo.closePhidget()
raise
sensor.close()
servo.closePhidget()